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Analog Devices Inc./Maxim Integrated MAX6800UR44D3
- Part No.:
- MAX6800UR44D3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6800UR44D3.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,263
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Product details
Overview
MAX6800UR44D3 from Maxim Integrated is a precision push/pull active-high microprocessor supervisory circuit in SOT23-3 package, monitoring 4.38V ±3% supply threshold with 100ms minimum reset timeout, ultra-low 4µA supply current, and guaranteed operation down to VCC = 0.7V - used for reliable power-on reset in battery-powered microcontroller systems.
For engineers reviewing the MAX6800UR44D3 datasheet, MAX6800UR44D3 pinout, MAX6800UR44D3 application, or MAX6800UR44D3 equivalent, key selection criteria include its active-high RESET output, factory-trimmed 4.38V threshold, 100ms timeout, SOT23-3 footprint compatibility with MAX809/MAX6326 families, and operation across -40°C to +125°C industrial temperature range.
Technical Context
The MAX6800UR44D3 implements a precision bandgap-based reset comparator with factory-trimmed 4.38V threshold (±1.8% at +25°C, ±3% over full temperature), immune to fast VCC transients up to 30µs at 100mV overdrive. Its internal timing circuit generates a guaranteed minimum 100ms reset pulse after VCC rises above threshold.
This device uses BiCMOS process technology and features push/pull output stage capable of sourcing ≥800µA at VCC ≥4.25V while maintaining VOH ≥0.8×VCC, and sinking ≥3.2mA while holding VOL ≤0.4V - enabling direct interface with CMOS inputs without external pull-up resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.38V ±3% over -40°C to +125°C - ensures reliable detection of 4.5V nominal supply brownout |
| Reset Timeout Period | 100ms minimum - meets JEDEC JESD78 requirement for microcontroller initialization hold time |
| Supply Current | 4µA typical at VCC = 3.0V - enables >10-year battery life in coin-cell-powered IoT sensors |
| Operating Voltage Range | 0.7V to 5.5V - guarantees valid RESET assertion even during deep brownout recovery |
| Output Type | Active-high push/pull - eliminates need for external pull-up resistor in most µP reset interfaces |
| Temperature Range | -40°C to +125°C - qualified for under-hood automotive and industrial control applications |
| VCC Propagation Delay | 30µs max on VCC fall - provides fast response to supply glitches without false triggering |
Pinout & Package
MAX6800UR44D3 is housed in a RoHS-compliant 3-pin SOT23-3 package (outline 21-0051, land pattern 90-0179), with 1.3mm × 2.9mm footprint and 0.95mm height - compatible with standard high-volume pick-and-place assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Return path for internal comparator and output driver; must be low-impedance connection to system ground plane |
| 2 (RESET) | Active-high push/pull reset output | Drives high during reset assertion (VCC < 4.38V); sinks current when deasserted - directly interfaces µP reset input without external components |
| 3 (VCC) | Supply voltage input | Monitored power rail input; supports operation down to 0.7V - enables reset generation even during severe undervoltage conditions |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 4.38V with ±3% tolerance over full temperature - eliminates manual calibration and external resistor networks |
| Ultra-low quiescent current | 4µA typical - reduces standby power in always-on embedded systems and extends battery life |
| Transient-immune reset comparator | Rejects VCC glitches ≤30µs at 100mV amplitude - prevents spurious resets in noisy power environments |
| Guaranteed operation to 0.7V VCC | Valid RESET output asserted until VCC drops below 0.7V - ensures deterministic behavior during complete power collapse |
| Pin-compatible with legacy supervisors | Direct replacement for MAX809/MAX6326 series in same SOT23-3 footprint - enables drop-in upgrade without PCB revision |
Applications
| Industrial PLC Controller | Portable Medical Monitor |
|---|---|
Use Scenario: Microcontroller-based programmable logic controller operating from 4.5V–5.0V SMPS supply in factory automation cabinet. IC Role / Device Role / Timing Role: Active-high reset supervisor asserting RESET until VCC stabilizes above 4.38V, then holding for 100ms to ensure firmware boot sequence integrity. Use Value: Prevents erratic startup due to marginal 4.5V rail droop during motor switching transients - eliminates field failures requiring manual reset. |
Use Scenario: Battery-powered ECG monitor using Li-ion cell (3.0V–4.2V) with boost converter regulating to 4.5V for MCU core. IC Role / Device Role / Timing Role: Monitors boosted 4.5V rail; asserts active-high RESET during battery depletion or cold-start undervoltage events. Use Value: Ensures safe shutdown before memory corruption occurs - critical for FDA Class II medical device data integrity compliance. |
| Automotive Body Control Module | Smart Energy Meter |
Use Scenario: Under-hood BCM powered from vehicle battery (9V–16V) via LDO regulator set to 4.5V, exposed to load-dump and cold-crank transients. IC Role / Device Role / Timing Role: Provides robust power-on reset with 100ms timeout and glitch immunity - holds MCU in reset during cranking-induced 6V dips. Use Value: Eliminates need for external RC network and improves AEC-Q100 Grade 2 qualification margin by reducing component count. |
Use Scenario: Revenue-grade electricity meter with isolated MCU running from 4.5V rail derived from AC line via flyback converter. IC Role / Device Role / Timing Role: Supervises 4.5V supply to guarantee clean reset during grid sags and lightning-induced surges. Use Value: Meets IEC 62053-21 accuracy requirements by preventing meter firmware lockup during 100ms+ voltage interruptions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809SUR44D3-T | Same 4.38V threshold and 100ms timeout, but rated only to +85°C ambient | Limited to commercial/industrial indoor applications, not extended temperature automotive or industrial | Select when cost sensitivity outweighs extended temperature requirement and board space allows same SOT23-3 footprint |
| MAX6326SUR44D3-T | Identical 4.38V threshold and 100ms timeout, but includes watchdog timer function | Required where firmware hang detection is mandated (e.g., safety-critical subsystems) | Choose when system-level watchdog functionality is needed beyond basic power-on reset |
Compared with MAX809SUR44D3-T and MAX6326SUR44D3-T, the MAX6800UR44D3 offers full -40°C to +125°C operation without added complexity or cost premium - making it optimal for automotive and harsh-environment applications where temperature resilience is non-negotiable.
Availability
MAX6800UR44D3 is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, automotive body control modules, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6800UR44D3 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) designs precision analog and mixed-signal ICs for industrial, automotive, communications, and computing markets - emphasizing reliability, low power, and integration.
The MAX6800 family delivers single-function, low-cost microprocessor supervisory circuits optimized for space-constrained, battery-sensitive, and high-reliability applications - with emphasis on guaranteed reset behavior across extreme voltage and temperature conditions.
FAQ
What is the exact reset threshold voltage of MAX6800UR44D3 and how tightly is it specified?
The MAX6800UR44D3 has a factory-trimmed nominal reset threshold of 4.38V, with tolerance of ±1.8% at +25°C and ±3% over the full -40°C to +125°C operating range. This specification is guaranteed by production testing and design validation - ensuring consistent brownout detection across all units without calibration.
Does MAX6800UR44D3 require an external pull-up resistor on its RESET pin?
No, the MAX6800UR44D3 features a push/pull output stage that actively drives high during reset assertion and sinks current when deasserted. Unlike open-drain supervisors, it requires no external pull-up resistor - simplifying layout and eliminating a potential source of leakage or noise coupling in the reset path.
Can MAX6800UR44D3 operate reliably when the supply voltage drops below 1.0V?
Yes, the MAX6800UR44D3 is guaranteed to maintain correct reset state down to VCC = 0.7V, with functional operation confirmed from 0.78V to 5.5V across -40°C to +125°C. This ensures deterministic reset assertion during deep brownout events common in battery-depleted or cold-cranking scenarios.
What is the minimum reset timeout period for MAX6800UR44D3 and is it temperature-stable?
The MAX6800UR44D3 provides a guaranteed minimum reset timeout of 100ms after VCC rises above the 4.38V threshold. Typical variation across -40°C to +125°C is within ±15% of nominal - verified in production and documented in the "Normalized Reset Timeout Period vs. Temperature" graph of the datasheet.
Is MAX6800UR44D3 pin-compatible with older Maxim reset supervisors like MAX809?
Yes, the MAX6800UR44D3 uses the identical SOT23-3 package and pinout (GND, RESET, VCC) as MAX809/MAX6326 families. It is explicitly listed as pin-compatible in the datasheet - enabling direct replacement without PCB modification, provided the active-high output matches the target µP's reset polarity requirement.
MAX6800UR44D3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.38V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MAX6800UR44D3 FAQ
1.How can I place an order for MAX6800UR44D3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6800UR44D3 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX6800UR44D3 reliable?
The price and inventory of MAX6800UR44D3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6800UR44D3 is usually 5 days.
3.What payment methods are accepted for MAX6800UR44D3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6800UR44D3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6800UR44D3?
MAX6800UR44D3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6800UR44D3 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX6800UR44D3?
For technical support, including MAX6800UR44D3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6800UR44D3 requirements.
6.How does Aetrix verify that MAX6800UR44D3 is sourced from the original manufacturer or authorized distributors?
All MAX6800UR44D3 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX6800UR44D3 meets industry standards.
7.What is the process for return or replacement of MAX6800UR44D3?
All MAX6800UR44D3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6800UR44D3, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX6800UR44D3 part is unused and in its original packaging.
Return procedure for MAX6800UR44D3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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